Strength analysis of a regenerative flow compressor and a pump based on fluid-structure coupling

The strength of an oil carrier is generally checked using static load or equivalent load of wave action in accordance with relevant specifications. In order to accurately calculate the stress and the deformation of an oil carrier under wave action, the fluid-structure interaction system in the platform Workbench is used in this work. And, the pressure-based solver, the two-phase flow model and UDF (User Defined Function) in the software FLUENT are used to compile the three-order Stokes Wave so as to simulate ocean waves. Forces acting on the surface of the oil carrier are obtained by calculating the flow field, and the structural strength of the carrier is then investigated under sagging and hogging conditions. The results show that: the three-order Stokes Wave matches well with the theoretical result, and it is feasible to research the strength of the oil carrier by generating waves using this numerical method. In addition, the method of fluid-structure interaction is applied to investigate the structural strength of the fully-loaded carrier under sagging and hogging conditions.

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A modified theory for the flow mechanism in a regenerative flow pump

Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy ◽

10.1243/095765003322066538 ◽

2003 ◽

Vol 217 (3) ◽

pp. 311-321 ◽

Cited By ~ 36

Author(s):

J. W. Song ◽

A Engeda ◽

M. K. Chung

Keyword(s):

Flow Region ◽

Hydrogen Gas ◽

Space Vehicles ◽

Fully Developed Flow ◽

Vortex Compressor ◽

Agricultural Industries ◽

Flow Compressor ◽

Regenerative Flow ◽

Modified Theory ◽

Flow Pump

The regenerative flow pump (RFP) and regenerative flow compressor (RFC) are turbomachines capable of developing high pressure ratios in a single stage. They are also known by other names, such as peripheral, side channel, turbine, traction and vortex compressor/pump. Even though the efficiency of RFP/RFC is usually less than 50 per cent based on past design experience, they have found wide applications in automotive and aerospace fuel pumping, booster systems, water supply, agricultural industries, shipping and mining, chemical and food stuffs industries, and regulation of lubrication and filtering. RFCs have been proposed for use in hydrogen gas pipelines and as helium compressors for cryogenic applications in space vehicles. RFTs are used as accessory drives on aircraft and missiles. With the aim of improving the performance and efficiency of an RFP, this paper proposes an improved and modified theoretical model that can explain the change in the circulatory velocity caused by variation in channel area. All previous works concentrated on the fully developed flow region in the RFP and this work expands consideration to the developing region. Furthermore, in order to make the above-suggested model a closed problem, several loss models were assumed and the results of predictions were compared with experimental and CFD data.

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Shape optimization of regenerative flow compressor with aero-foil type blades using response surface methodology coupled with CFD

Structural and Multidisciplinary Optimization ◽

10.1007/s00158-021-03020-z ◽

2021 ◽

Author(s):

Jafar Nejadali

Keyword(s):

Response Surface Methodology ◽

Shape Optimization ◽

Response Surface ◽

Flow Compressor ◽

Regenerative Flow

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Fluid–Structure Interaction Numerical Analysis of a Small, Urban Wind Turbine Blade

Energies ◽

10.3390/en13071832 ◽

2020 ◽

Vol 13 (7) ◽

pp. 1832 ◽

Cited By ~ 3

Author(s):

Michal Lipian ◽

Pawel Czapski ◽

Damian Obidowski

Keyword(s):

Wind Turbine ◽

Structural Strength ◽

Fluid Structure Interaction ◽

Point Of View ◽

Operating Conditions ◽

Strength Analysis ◽

Fluid Structure ◽

Rotor Aerodynamics ◽

Structure Interaction ◽

Small Wind Turbine

While the vast majority of the wind energy market is dominated by megawatt-size wind turbines, the increasing importance of distributed electricity generation gives way to small, personal-size installations. Due to their situation at relatively low heights and above-ground levels, they are forced to operate in a low energy-density environment, hence the important role of rotor optimization and flow studies. In addition, the small wind turbine operation close to human habitats emphasizes the need to ensure the maximum reliability of the system. The present article summarizes a case study of a small wind turbine (rated power 350 W @ 8.4 m/s) from the point of view of aerodynamic performance (efficiency, flow around blades). The structural strength analysis of the blades milled for the prototype was performed in the form of a one-way Fluid–Structure Interaction (FSI). Blade deformations and stresses were examined, showing that only minor deformations may be expected, with no significant influence on rotor aerodynamics. The study of an unorthodox material (PA66 MO polyamide) and application of FSI to examine both structural strength and blade deformation under different operating conditions are an approach rarely employed in small wind turbine design.

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A Regenerative Flow Compressor as a Secondary Air Pump for Engine Emission Control

Volume 5: Industrial and Cogeneration; Microturbines and Small Turbomachinery; Oil and Gas Applications; Wind Turbine Technology ◽

10.1115/gt2010-22087 ◽

2010 ◽

Author(s):

Abraham Engeda

Keyword(s):

Exhaust System ◽

Injection System ◽

Automotive Engine ◽

Rich Mixture ◽

Unburned Hydrocarbons ◽

Secondary Air ◽

Flow Compressor ◽

Regenerative Flow ◽

Cold Starts ◽

Engine Emission

The automotive engine requires a relatively rich mixture of fuel and air for smooth operation on cold start. Exhaust gases contain high levels of carbon monoxide and hydrocarbons after cold starts. The unburned hydrocarbons could be further oxidized, except there is no oxygen left after combustion. Using a Secondary Air Pump (SAP), air is fed into the exhaust manifold (secondary air), the CO and HC are oxidized through afterburning at temperatures over 600°C to form water and carbon dioxide. An activated secondary air injection system leads to an increase in oxygen content in the exhaust system. This paper discuses the performance of a Regenerative Flow Compressor (RFC) for SAP application and shows the RFC to be the best choice for satisfying the required specification of the SAP.

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A regenerative flow compressor as a secondary air pump for engine emission control

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1243/09544062jmes958 ◽

2008 ◽

Vol 222 (9) ◽

pp. 1707-1715 ◽

Cited By ~ 3

Author(s):

A Engeda ◽

Y Elkacimi

Keyword(s):

Emission Control ◽

Exhaust System ◽

Control Device ◽

Automotive Engine ◽

Positive Displacement ◽

Computational Fluid Dynamics Analysis ◽

Secondary Air ◽

Flow Compressor ◽

Regenerative Flow ◽

Engine Emission

A secondary air pump (SAP) is an air compressor that supplies air to the exhaust system of an automotive engine for the emission control of the engine. The SAP system has been offered as an emission control device in later versions of cars, starting in the mid-1990s. Various types of rotary and positive displacement air pumps have been tested and used for SAP application. The regenerative flow compressor/pump (RFC or RFP) and the centrifugal compressor have been found to be best suited for SAP application. This paper discusses the performance of an RFC for SAP application and shows the RFC to be the best choice for satisfying the required specifications of the SAP. Computational fluid dynamics analysis of the RFC for an SAP application was carried out to study its performance in detail.

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